Now I really, really hate doing this!!!

Hi Mick, leccies are very noisy from an electronics point of view 2.4gigs handles the noise better than 36meg. The reason is that because the ESC is switching DC you have square waves all over the place, and a square wave contains all the odd harmonics from 1 to infinity. If you're very unlucky one of these might be on your operating frequency and swamp your receiver! This is why you must always do a proper range check, never take a chance!
Discounting different amperages and total volts, there are only 2 types of ESC, one for brushed (can) motors, this has 4 main wires, 2 in, 2 out and usually a plug to power the receiver. The general concensus is, chuck all brushed stuff away and start over! Brushless ESCs' have 2 in and 3 out and usually a plug to power the receiver. The ESC actually generates it's own 3 phase signal to drive the motor, then checks the speed of rotation in the gaps in the signal! All clever stuff! There are two types of brushless motor, inrunner and outrunner, the inrunners tend to be the types with the higher Kv because the rotor is inside, and therefore smaller diameter, these are mostly used for EDFs. The outrunner types are much more common, the propeller is mounted on the case and the whole lot spins on a backplate, rather like a Gnome! It is very important with outrunners to make absolutely sure that the wires are kept away from the spinning case! Prop direction is changed by literally swopping 2 of the 3 wires around!
To Bec or not to Bec that is the question, It's usually the larger ESCs that don't have Bec, I guess it's because the models are large, expensive and tend to have redundancy systems built in. Most ESCs have 2 or 3 amp Becs, the stand alone types go 5 or 8 amps and more!
I prefer a separate receiver supply myself (there's a thread on this site) since if you're using the ESC Bec and the battery fails it's goodbye model! With a separate supply it's only a dead stick!

Now THAT! was a comprehensive reply! haha.

Enjoyed reading that klippy.

One bit that Klippy glossed over, but you might not have understood -
types with the higher Kv
Kv is merely revs per volt of the power supply.
Otherwise spot on.

Humpf, I never get anything right!
Kv is a way of denoting the speed of the motor. First decide on a propeller size, since this is often limited by certain factors, then decide on the maximum speed you want and up it by 20%. Now divide that speed (in inches per minute) by the pitch prop you want to use. (I find 6" is a good jack of all trades) The number that you end up with is the RPM you're going to need at full throttle.
Right, now make a decision as to Battery voltage, Lipos' work in leaps of 3.7volts, and I recommend anybody to buy 3S at the outset, since they're the commonest and therefore the cheapest (economy of scale). 3S indicates 3 cells wired in series, and series means that the voltages are additive, so that's 11.1volts, isn't it?
Now we have enough information to plug in some numbers
60mph

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6"

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11.1v
60mph = 1mile/minute = 1 x 6280 x 12 = 12,560rpm, the maximum rpm we're going to need
12560/11.1 = 1131Kv
That exact number is not going to be available but 1200Kv is a common size. You can work out for yourself what to maximum RPM will be!
We don't have enough informative to flex the plastic yet, but we've made a start.

Just to confuse everyone, as far as I'm concerned the Kv nomenclature is wrong, in the electronics world a 1,200ohm resistor is called 1.2K ie 1.2 x 1,000. To me a 1,200Kv motor should be called a 1.2Kv.

Tesla = Volt second/meter squared - I see the words.......

And that old chap Isaac, with his apple, then there is meteorology, for the wind, and thermals, and......

Nothing is as simple as it seems, except me!